You can't lose Jenkins as a starter if you have his replacement. That makes no sense
You actually do lose Jenkins as a starter by replacing him. He is no longer starting.
Let me try to explain it like this. Is upgrading from Mike Jenkins to Morris Claiborne worth 2 other starting players? Without the trade we made we would still have Jenkins most likely penciled in to start plus the players we drafted with our original 1st two draft picks.
Before the draft this was the majority of thinking. We had replaced Newman with Brandon Carr, we had Scandrick as our 3rd CB, and Jenkins was going to either earn a new contract or be allowed to leave in a year. We had holes at safety (all of the Mark Barron talk), interior OL (DeCastro talk), and were in need of upgrading the DL (Fletcher Cox, Michael Brockers). There was talk of drafting a CB later for depth but I don't think too many draft guru's or Cowboy fans were screaming for an immediate upgrade over Jenkins.
Now obviously the Cowboys felt differently. I just don't get how you guys aren't looking at our issues now in Training Camp and not realizing we probably would have been better off keeping and using our first two picks. Also, Jenkins didn't start talking about trades or rehabbing elsewhere until after we drafted Claiborne. IMO there's no reason to believe he wouldn't have shown up to OTA's and rehab on time if he was still the projected starter.